Silicifying dinoflagellates

Classification: non_cocco -> Dinophytes -> Silicifying dinoflagellates
Sister taxa: Calcareous dinoflagellates, Organic-walled dinoflagellates, Silicifying dinoflagellates,

Daughter taxa (blue => in age window 0-300Ma) Granddaughter taxa
Dinoflagellate with siliceous internal skeleton formed of two star-like bodies


Morphology remarks: Siliceous endoskeletal body

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within Paleocene Epoch (55.96-66.04Ma, base in Danian stage). Data source: Dumitrica 1986


Dumitrica 1986 [sorry, not in our bibliography yet]


Silicifying dinoflagellates compiled by Jeremy R. Young viewed: 22-3-2018

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Comments (2)

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Juan P. Pérez Panera (Berisso, Argentina)

I will look for the original photos whenever I return to Argentina.

According to Rai et al. 2008. Indian Journal of Marine Sciences, 37: 430-434; they occur from Late Eocene to Recent, beeing more common in the Late Neogene to Recent. There is also another nice paper: Dumitrica, 1973. CENOZOIC ENDOSKELETAL DINOFLAGELLATES IN SOUTHWESTERN PACIFIC

SEDIMENTS CORED DURING LEG 21 OF THE DSDP. In Initial Reports of the Deeps Sea Drilling Project, 21: 819-835.

Jeremy Young (UK)

Ah yes I had not looked at the Dumitrica paper before butI see now that it is a very useful review - i will aim to put the info into Nannotax sometime, for now I will add a reference to it.



Juan P. Pérez Panera (Berisso, Argentina)

Regarding the fossil record, I found them in Miocene samples from DSDP site 329. I know these images are bad, I´m taking them from a PPT Presentation, but I have the original ones somewhere. And also the slides.

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Jeremy Young (UK)

nice - that is clearly Actiniscus, if you get better images I will put them on the page properly. It may well have a documented fossil record, I have not looked at the literature on these forms in any depth.


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